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What is the effect of acid on the solubility of AgCl and Ag2CO3?

April 26, 2017acid agcl Chemistry Mathematics solubility

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What is the effect of acid on the solubility of AgCl and Ag2CO3?

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First of all it depends on the acid. If you use the conjugate acid of the anion eg HCl for AgCl then you have a common ion effect and thus you will be reducing the solubility. If you use an acid like HNO3, which doesn’t have a common ion, doesn’t form a different precipitate with Ag+, or a complex ion with Ag+, then the solubility of AgCl should not be affected as HCl is also a stong acid and thus in solution you will have the Ag+, Cl-, H+ and NO3- ions. On the other hand, the solubility of Ag2CO3 will increase since H2CO3 is a weak acid, so some of the CO3^-2 ions will now become HCO3^-1 and if you acidify a lot then you will have some H2CO3 forming which will decompose in H2O and gas CO2 and a lot of the CO2 will leave the solution.